Smart Contract
By Menno — 13 years in crypto, 3 bear markets survived, zero paid promotions
Last updated: March 2026
A smart contract is a self-executing program stored on a blockchain that automatically enforces the terms of an agreement when predefined conditions are met, without needing a middleman.
Smart contracts are programs deployed on blockchains like Ethereum that execute automatically when specific conditions are met. Think of them as programmable money: "if X happens, then do Y."
Example: a DeFi lending smart contract might say "if the user deposits 1 ETH as collateral, allow them to borrow up to $2,000 in USDC. If the collateral value drops below $2,200, automatically liquidate the position."
No human needs to approve or process this — the code handles everything. This enables trustless financial services that operate 24/7.
Smart contracts power: DeFi protocols, NFT marketplaces, DAOs (decentralized governance), token sales, automated market makers, and much more.
The risk: smart contracts are only as good as their code. Bugs or vulnerabilities can be exploited, and because blockchain transactions are irreversible, stolen funds are usually gone permanently. This is why audits and battle-tested protocols matter.
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